PS: my GraphQL skills are pretty basic so sorry for any incorrect use of words and terms
I want to achieve filtering on the code field highlighted below
(transactions --> edges --> node --> header --> transactionSource --> code = "something"
{
transactions(last: 10) {
edges {
node {
amount
periodId
header {
owner {
owner {
code
description
dbId
ownerDbId
ownerCode
}
}
transactionSource {
code
}
}
}
}
pageInfo {
hasNextPage
}
}
}
The client i'm working with have defined a list of filtering options, which I can successfully filter on, but when I try to filter on the code field I get the following result:
{
"errors": [
{
"message": "Argument 'filter' has invalid value. In field 'code': Unknown field.",
"locations": [
{
"line": 2,
"column": 26
}
],
"extensions": {
"code": "ARGUMENTS_OF_CORRECT_TYPE",
"codes": [
"ARGUMENTS_OF_CORRECT_TYPE"
],
"number": "5.6.1"
}
}
]
}
I presume this is because of me not knowing exactly how to set up the filter correctly.
Is there a way to filter on any field or do I need to talk to the guys maintaining the client and ask them nicely to make the code field available for filtering?
Thanks
Related
I try to retrieve the relations of the database of my directus app.
I use GraphQL with following endpoint https://myapp.directus.app/graphql.
Using a query for the relations according to the docs
query {
relations {
collection
field
}
}
leads to an validation error:
{
"errors": [
{
"message": "GraphQL validation error.",
"extensions": {
"code": "GRAPHQL_VALIDATION_EXCEPTION",
"graphqlErrors": [
{
"message": "Cannot query field "relations" on type "Query". Did you mean "locations"?",
"locations": [
{
"line": 2,
"column": 2
}
]
}
]
}
}
]
}
I use Postman so far and started with a query for the database entries
query {
boards {
id
columns {
id
name
}
}
}
which works as expected.
What I find interesting is, that Postman shows an mouseover text on the keyword "relations" of the 2nd query -->
"Cannot query field relations on type Query. Did you mean locations?"
But unfortunately I have no idea what to do with that message.
Any ideas what is wrong here?
Meanwhile I found the problem. The endpoint for queries on relations is https://myapp.directus.app/graphql/system
With that the query
query {
relations {
collection
field
}
}
is working
GraphQL lets you ask for specific fields, the response contains only the fields that you had asked for. For example:
a graphql query like:
{
hero {
name
}
}
will return:
{
"data": {
"hero": {
"name": "R2-D2"
}
}
}
where as a graphQl query like:
{
hero {
name
friends {
name
}
}
}
would return:
{
"data": {
"hero": {
"name": "R2-D2",
"friends": [
{
"name": "Luke"
},
{
"name": "Han Solo"
},
{
"name": "Leia"
}
]
}
}
}
Is there a similar mechanism/library/pattern that can be used in gRPC to achieve the same?
FieldMask is similar in protobuf. It is a list of fields to retain, so the first example would be paths: "hero.name" and the second would be paths: ["hero.name", "hero.friends.name"].
It is probably most frequently used to specify which fields should be changed in an update. But it can equally be used to specify the fields that should be returned.
The server can either process the FieldMask directly (e.g., only using the listed fields in a SELECT SQL query), or it can retrieve all the information and filter the result using FieldMaskUtil.merge() to copy just the requested fields into a new proto message to return to the client.
I was looking at the new graphql endpoint exposed by Magento 2.3.1 and above at the query for listing products:
query products(
pageSize:6,
currentPage:1,
filter:{
category_id: { eq: "3" }
}
) {
filters {
name
request_var
filter_items_count
filter_items {
label value_string
}
}
items {
id
name
small_image {
url
}
# ...
}
# ...
}
The response body yields products in the items property just as expected and a bunch of custom filters in an array in the filters property which look like this:
"filters": [
{
"name": "Activity",
"request_var": "activity",
"filter_items_count": 12,
"filter_items": [
{
"label": "Outdoor",
"value_string": "5"
},
{
"label": "Yoga",
"value_string": "8"
},
{
"label": "Recreation",
"value_string": "9"
},
// rest of filter values
]
},
// rest of filters
]
Given the fact that those filters are dynamic and user defined is there a way of sending them back with a list products query in graphql? I would expect to have a property somewhere under the products query that could be an array of aforementioned filter objects but so far I haven't found anything neither in the schema nor in the official documentation.
Did anyone have any similar experience with this?
No. Theres no way of getting the filtered options sent back. There are options where you can return the additional filtering abilities (similar to when you are viewing a category page) to return list of ways to filter but nothing that returns the current active filters in place.
{
products(filter: {sku: {like: "%"} } pageSize: 500) {
filters{
request_var
name
filter_items{
label
value_string
}
}
items {
id
sku
name
...
}
}
}
Currently having an issue with the relay approach to nested pagination. An example below to illustrate what I mean:
{
"data": {
"locations": {
"edges": [
{
"node": {
"id": "Location_254"
}
},
{
"node": {
"id": "Location_247"
}
},
{
"node": {
"id": "Location_217"
}
},
]
}
}
Here I have 3 locations returned from a query. Now I wanted to paginate on these locations and look at their 'history'.
query {
locations {
edges {
node {
history(
first:10
after:"eyJzbm9vemVJZCI6Mzg3fQ=="
)
}
}
}
}
This would paginate 10 results after the specified cursor. My issue is, is that this cursor is specific to the location it was obtained from. The cursor it is referring to paginate after, only applies to the location it came from.
Nested pagination tries to paginate on ALL locations here, when in actuality, the cursor being used, was grabbed from a specific location.
Am I seeing this incorrectly, or is there a better way I could be approaching this issue?
Regards, Sebastian
Here is query where I try to use distinct in graphQl query:
query{
contacts(take: 10, distinct: true) {
firstName
lastName
title
}
}
But I am getting error:
{
"errors": [
{
"message": "Unknown argument \"distinct\" on field \"contacts\" of type \"QuerySchema\".",
"locations": [
{
"line": 2,
"column": 21
}
]
}
]
}
GraphQL has no built-in sorting/filtering. It is up to the server to implement features like that, so if you're relying on a third party API and it doesn't support it then you will have to filter the response yourself.
You need to specify the column that GraphQL will use to check wether a value is distinct. In your case you can do something like:
query MyQuery {
contacts(distinct_on: firstName) {
firstName
lastName
title
}
}
Here is a example of distinct query.
query {
contacts {
distinct(field: title)
}
}
Result will be.
{
"data": {
"contacts": {
"distinct": [
"This is my test post",
"This is my test post1",
"This is my test post2"
]
}
}
}
This query binds all titles and deduplicates.